Quantity: one piece 40 micron filter: effectively filters out impurities, sand and rust. The high-quality stainless steel brass precision filter is used to effectively remove particulate impurities, sand and rust from the water. Easy to Clean & Replace: Open the bottom valve, the filter is automatically cleaned. Regular flushing (daily or weekly) is recommended, depending on water usage, sand content and hardness, and can be reused. the filter. Whole House Water Purifier: This fountain water sedimentation filter can improve the water supply system. the whole house water, making sure the clean water covers the whole house, the washing machine, the water purifier, the water, the kettle, etc.